On 03/07/2018 08:23 AM, Stephen wrote:
> 
> I’ve run into a problem using a large sphere_sweep. I get a horizontal, 
> straight line artefact.
> You can change the location of the artefact by raising or lowering 
> either the camera location or look_at vector.
> Happens in both ver 3.6 and 3.7
> I posted the pov and ini files in povray.binaries.scene-files
> 

Thanks for posting the scene and ini file. It looks like this is one of 
the sphere_sweep artifacts Christoph fixed in the updates for 
release/v3.8.0 and so too in the master (v3.8.1) branch.

Aside: this is the sort of artifact I've sometimes been able to 
ameliorate by using an odd number of pixels in a direction perpendicular 
to the artifact - trick works better at low resolutions. In this case an 
odd number of pixels vertically just changes to 3.7.0 artifact some...

Bill P.

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